Isoscalar and isovector kaon form factors from e+e− and τ data

The recent precise measurements of the e + e − → KS KL and e + e − → K + K − cross sections and the hadronic spectral function of the τ− → K − KS ντ decay are used to extract the isoscalar and isovector electromagnetic kaon form factors and their relative phase in a model independent way. The experimental results are compared with a fit based on the vector-meson-dominance model.